package com.sky.controller.user;

import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Api(tags = "C端--菜品浏览接口")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类ID查询菜品及其口味
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类ID查询菜品")
    public Result<List<DishVO>> list(Long categoryId){

        //构造redis中的key，规则：dish_分类id
        String key="dish_"+categoryId;
        //查询redis中是否存在菜品数据
        List<DishVO> dishes =(List<DishVO>) redisTemplate.opsForValue().get(key);
        //如果存在，直接返回,无需查询数据库
        if(dishes!=null&&dishes.size()>0){
            return Result.success(dishes);
        }
        //如果不存在，查询数据库，并将数据存入redis中
        log.info("根据分类ID查询菜品:{}",categoryId);
        dishes=dishService.getByCategoryId(categoryId);
        redisTemplate.opsForValue().set(key,dishes);

        return Result.success(dishes);
    }
}
